A bar magnet of moment M- is placed in a magnetic field induction B-3-4-4k-The torque acting on the magnet is

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Magnetic Field Due to a Straight Current Carrying Conductor

A bar magnet ...

Question

A bar magnet of moment $\to M =^i +^j$ is placed in a magnetic field induction $\to B = 3^i + 4^j + 4^k$ .
The torque acting on the magnet is

4^j - 4^j +^k

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^i +^k

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^i +^j

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^i +^j +^k

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Solution

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Similar questions

\to a = 3^i + 4^j - 5^k

|^i \times (\to a \times^i) +^j \times (\to a \times^j) +^k \times (\to a \times^k) | =

3^i + 4^j +^k

^i +^j -^k

\to a = 3^i - 2^j +^k,

\to b = 2^i - 4^j - 3^k, \to c = -^i + 2^j + 2^k

\to a + \to b + \to c = 4^i - 4^j

\to a =^i -^j + 2^k, \to b = 2^i + 3^j +^k, \to c =^i -^k

\to a + 2 \to b - 3 \to c

\sqrt{78}

\to a = 2^i + 3^j - 4^k

\to b =^i +^j +^k

\to c = 4^j + 3^k

| (¯ ¯ ¯ a \times ¯ ¯ b) \times ¯ ¯ c |

\to a, \to b, \to c

\to a, & \to b

\to a =^i +^j +^k; \to b = 2^i + 4^j -^k & \to c =^i +^j + 3^k

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